add wasmer support

CMakeLists.txt

@@ -55,10 +55,15 @@ endif()
 
 option(HERA_WAVM "Build with WAVM" OFF)
 if (HERA_WAVM)
-    include(ProjectWAVM)
+include(ProjectWAVM)
 endif()
 
-if (NOT (HERA_BINARYEN OR HERA_WABT OR HERA_WAVM))
+option(HERA_WASMER "Build with wasmer" OFF)
+if (HERA_WASMER)
+    include(ProjectWasmer)
+endif()
+
+if (NOT (HERA_BINARYEN OR HERA_WABT OR HERA_WAVM OR HERA_WASMER))
     message(FATAL_ERROR "At least one one engine must be enabled.")
 endif()
 

README.md

@@ -60,6 +60,15 @@ Please also check the build options listed in the following section.
 - `-DHERA_WAVM=ON` will request the compilation of WAVM support
 - `-DLLVM_DIR=...` one will need to specify the path to LLVM's CMake file. In most installations this has to be within the `lib/cmake/llvm` directory, such as `/usr/local/Cellar/llvm/6.0.1/lib/cmake/llvm` on Homebrew.
 
+### wasmer support
+
+*Complete support.*
+
+[wasmer] support needs to be enabled via the following build option and requested at runtime with `engine=wavm`:
+
+- `-DHERA_WASMER=ON`
+- `cargo` is needed to build.
+
 ## Runtime options
 
 These are to be used via EVMC `set_option`:
@@ -127,6 +136,7 @@ Apache 2.0
 [Binaryen]: https://github.com/webassembly/binaryen
 [wabt]: https://github.com/webassembly/wabt
 [WAVM]: https://github.com/WAVM/WAVM
+[wasmer]: https://github.com/wasmerio/wasmer
 [Sentinel system contract]: https://github.com/ewasm/design/blob/master/system_contracts.md#sentinel-contract
 [EVM Transcompiler]: https://github.com/ewasm/design/blob/master/system_contracts.md#evm-transcompiler
 [EEI]: https://github.com/ewasm/design/blob/master/eth_interface.md

cmake/ProjectWasmer.cmake

@@ -0,0 +1,33 @@
+if(ProjectWasmerIncluded)
+    return()
+endif()
+set(ProjectWasmerIncluded TRUE)
+include(ExternalProject)
+include(GNUInstallDirs)
+
+# TODO: if find LLVM 8.0+ use make capi-llvm to get better permformance
+set(WASMER_BUILD_COMMAND make capi)
+ExternalProject_Add(wasmer
+        PREFIX ${CMAKE_SOURCE_DIR}/deps
+        DOWNLOAD_NO_PROGRESS 1
+        GIT_REPOSITORY https://github.com/wasmerio/wasmer.git
+        GIT_TAG 63a2d8129c7ad5ca670d041859de45e01292dd12
+        BUILD_IN_SOURCE 1
+        CONFIGURE_COMMAND ""
+        BUILD_COMMAND ${WASMER_BUILD_COMMAND}
+        INSTALL_COMMAND ""
+        LOG_CONFIGURE 1
+        LOG_BUILD 1
+        LOG_INSTALL 1
+        BUILD_BYPRODUCTS <SOURCE_DIR>/target/release/libwasmer_runtime_c_api.a
+)
+
+ExternalProject_Get_Property(wasmer SOURCE_DIR)
+set(WASMER_INCLUDE_DIRS ${SOURCE_DIR}/lib/)
+file(MAKE_DIRECTORY ${WASMER_INCLUDE_DIRS})  # Must exist.
+add_library(WASMER::runtim STATIC IMPORTED)
+set(WASMER_RUNTIME_LIBRARIES ${SOURCE_DIR}/target/release/libwasmer_runtime_c_api.a)
+set_property(TARGET WASMER::runtim PROPERTY IMPORTED_LOCATION ${WASMER_RUNTIME_LIBRARIES})
+set_property(TARGET WASMER::runtim PROPERTY INTERFACE_INCLUDE_DIRECTORIES ${WASMER_INCLUDE_DIRS})
+
+add_dependencies(WASMER::runtim wasmer)

src/CMakeLists.txt

@@ -28,6 +28,10 @@ if(HERA_WAVM)
   target_sources(hera PRIVATE wavm.cpp wavm.h)
 endif()
 
+if(HERA_WASMER)
+  target_sources(hera PRIVATE wasmer.cpp wasmer.h)
+endif()
+
 option(HERA_DEBUGGING "Display debugging messages during execution." ON)
 if(HERA_DEBUGGING)
   target_compile_definitions(hera PRIVATE HERA_DEBUGGING=1)
@@ -60,6 +64,11 @@ if(HERA_WAVM)
     target_link_libraries(hera PRIVATE wavm::wavm)
 endif()
 
+if(HERA_WASMER)
+    target_compile_definitions(hera PRIVATE HERA_WASMER=1)
+    target_link_libraries(hera PRIVATE WASMER::runtim)
+endif()
+
 install(TARGETS hera EXPORT heraTargets
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}

src/eei.h

@@ -109,7 +109,7 @@ class EthereumInterface {
 // WAVM/WABT host functions access this interface through an instance,
 // which requires public methods.
 // TODO: update upstream WAVM/WABT to have a context (user data) passed down.
-#if HERA_WAVM == 0 && HERA_WABT == 0
+#if HERA_WAVM == 0 && HERA_WABT == 0 && HERA_WASMER == 0
 protected:
 #endif
   virtual size_t memorySize() const = 0 ;

src/hera.cpp

@@ -38,6 +38,9 @@
 #if HERA_WABT
 #include "wabt.h"
 #endif
+#if HERA_WASMER
+#include "wasmer.h"
+#endif
 
 #include <hera/buildinfo.h>
 
@@ -72,6 +75,9 @@ const map<string, WasmEngineCreateFn> wasm_engine_map {
 #if HERA_WABT
   { "wabt", WabtEngine::create },
 #endif
+#if HERA_WASMER
+  { "wabt", WasmerEngine::create },
+#endif
 };
 
 WasmEngineCreateFn wasmEngineCreateFn =
@@ -82,6 +88,8 @@ WasmEngineCreateFn wasmEngineCreateFn =
     WabtEngine::create
 #elif HERA_WAVM
     WavmEngine::create
+#elif HERA_WASMER
+    WasmerEngine::create
 #else
 #error "No engine requested."
 #endif